An error occurred:
java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
Error log: /tmp/install4jError55851log
java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(Unknown Source)
at java.awt.Window.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at javax.swing.JFrame.<init>(Unknown Source)
at com.install4j.runtime.wizard.WizardFrame.<init>(Unknown Source)
at com.install4j.runtime.wizard.WizardBase.showFrame(Unknown Source)

Please take either the RPM or the TGZ package and do a manual installation if you cannot use X. Download the installation guide to learn more.